a2b38a3327f12e3ca264a85e9afafc59b68f314c
[ncurses.git] / ncurses / tinfo / lib_ttyflags.c
1 /****************************************************************************
2  * Copyright (c) 1998-2007,2008 Free Software Foundation, Inc.              *
3  *                                                                          *
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6  * "Software"), to deal in the Software without restriction, including      *
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9  * copies of the Software, and to permit persons to whom the Software is    *
10  * furnished to do so, subject to the following conditions:                 *
11  *                                                                          *
12  * The above copyright notice and this permission notice shall be included  *
13  * in all copies or substantial portions of the Software.                   *
14  *                                                                          *
15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS  *
16  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF               *
17  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.   *
18  * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,   *
19  * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR    *
20  * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR    *
21  * THE USE OR OTHER DEALINGS IN THE SOFTWARE.                               *
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23  * Except as contained in this notice, the name(s) of the above copyright   *
24  * holders shall not be used in advertising or otherwise to promote the     *
25  * sale, use or other dealings in this Software without prior written       *
26  * authorization.                                                           *
27  ****************************************************************************/
28
29 /*
30  *              def_prog_mode()
31  *              def_shell_mode()
32  *              reset_prog_mode()
33  *              reset_shell_mode()
34  *              savetty()
35  *              resetty()
36  */
37
38 #include <curses.priv.h>
39 #include <term.h>               /* cur_term */
40
41 MODULE_ID("$Id: lib_ttyflags.c,v 1.18 2008/08/03 22:10:44 tom Exp $")
42
43 NCURSES_EXPORT(int)
44 _nc_get_tty_mode(TTY * buf)
45 {
46     int result = OK;
47
48     if (buf == 0) {
49         result = ERR;
50     } else {
51         if (cur_term == 0) {
52             result = ERR;
53         } else {
54             for (;;) {
55                 if (GET_TTY(cur_term->Filedes, buf) != 0) {
56                     if (errno == EINTR)
57                         continue;
58                     result = ERR;
59                 }
60                 break;
61             }
62         }
63
64         if (result == ERR)
65             memset(buf, 0, sizeof(*buf));
66
67         TR(TRACE_BITS, ("_nc_get_tty_mode(%d): %s",
68                         cur_term ? cur_term->Filedes : -1,
69                         _nc_trace_ttymode(buf)));
70     }
71     return (result);
72 }
73
74 NCURSES_EXPORT(int)
75 _nc_set_tty_mode(TTY * buf)
76 {
77     int result = OK;
78
79     if (buf == 0) {
80         result = ERR;
81     } else {
82         if (cur_term == 0) {
83             result = ERR;
84         } else {
85             for (;;) {
86                 if (SET_TTY(cur_term->Filedes, buf) != 0) {
87                     if (errno == EINTR)
88                         continue;
89                     if ((errno == ENOTTY) && (SP != 0))
90                         SP->_notty = TRUE;
91                     result = ERR;
92                 }
93                 break;
94             }
95         }
96         TR(TRACE_BITS, ("_nc_set_tty_mode(%d): %s",
97                         cur_term ? cur_term->Filedes : -1,
98                         _nc_trace_ttymode(buf)));
99     }
100     return (result);
101 }
102
103 NCURSES_EXPORT(int)
104 def_shell_mode(void)
105 {
106     int rc = ERR;
107
108     T((T_CALLED("def_shell_mode()")));
109
110     if (cur_term != 0) {
111         /*
112          * If XTABS was on, remove the tab and backtab capabilities.
113          */
114         if (_nc_get_tty_mode(&cur_term->Ottyb) == OK) {
115 #ifdef TERMIOS
116             if (cur_term->Ottyb.c_oflag & OFLAGS_TABS)
117                 tab = back_tab = NULL;
118 #else
119             if (cur_term->Ottyb.sg_flags & XTABS)
120                 tab = back_tab = NULL;
121 #endif
122             rc = OK;
123         }
124     }
125     returnCode(rc);
126 }
127
128 NCURSES_EXPORT(int)
129 def_prog_mode(void)
130 {
131     int rc = ERR;
132
133     T((T_CALLED("def_prog_mode()")));
134
135     if (cur_term != 0) {
136         /*
137          * Turn off the XTABS bit in the tty structure if it was on.
138          */
139         if (_nc_get_tty_mode(&cur_term->Nttyb) == OK) {
140 #ifdef TERMIOS
141             cur_term->Nttyb.c_oflag &= ~OFLAGS_TABS;
142 #else
143             cur_term->Nttyb.sg_flags &= ~XTABS;
144 #endif
145             rc = OK;
146         }
147     }
148     returnCode(rc);
149 }
150
151 NCURSES_EXPORT(int)
152 reset_prog_mode(void)
153 {
154     T((T_CALLED("reset_prog_mode()")));
155
156     if (cur_term != 0) {
157         if (_nc_set_tty_mode(&cur_term->Nttyb) == OK) {
158             if (SP) {
159                 if (SP->_keypad_on)
160                     _nc_keypad(SP, TRUE);
161                 NC_BUFFERED(TRUE);
162             }
163             returnCode(OK);
164         }
165     }
166     returnCode(ERR);
167 }
168
169 NCURSES_EXPORT(int)
170 reset_shell_mode(void)
171 {
172     T((T_CALLED("reset_shell_mode()")));
173
174     if (cur_term != 0) {
175         if (SP) {
176             _nc_keypad(SP, FALSE);
177             _nc_flush();
178             NC_BUFFERED(FALSE);
179         }
180         returnCode(_nc_set_tty_mode(&cur_term->Ottyb));
181     }
182     returnCode(ERR);
183 }
184
185 static TTY *
186 saved_tty(void)
187 {
188     TTY *result = 0;
189
190     if (SP != 0) {
191         result = &(SP->_saved_tty);
192     } else {
193         if (_nc_prescreen.saved_tty == 0) {
194             _nc_prescreen.saved_tty = typeCalloc(TTY, 1);
195         }
196         result = _nc_prescreen.saved_tty;
197     }
198     return result;
199 }
200
201 /*
202 **      savetty()  and  resetty()
203 **
204 */
205
206 NCURSES_EXPORT(int)
207 savetty(void)
208 {
209     T((T_CALLED("savetty()")));
210
211     returnCode(_nc_get_tty_mode(saved_tty()));
212 }
213
214 NCURSES_EXPORT(int)
215 resetty(void)
216 {
217     T((T_CALLED("resetty()")));
218
219     returnCode(_nc_set_tty_mode(saved_tty()));
220 }